Echometer Premier

Echometer Premier

Boltight has been at the forefront of hydraulic bolt tensioning for over a decade. Our tensioning tools provide fast, accurate and safe solutions to tighten and loosen multiple bolts simultaneously.


The latest addition to our range of Ultrasonic Bolt Load & Elongation Measurement Instruments

The Echometer Premier ultrasonic measurement device has been developed specifically for the bolting industry which measures, displays, stores and transfers bolt elongation and load. A hard wearing unit with a touch screen. The most advanced instrument available to control or verify bolt elongation and load in the field or laboratory developed with input from the most experienced users and electronic developers in the bolt tightening industry delivering a system with intuitive software.


  • Easy to use colour touch screen display (Can be used with gloves or stylus).
  • Compatible with MS Windows and MS Excel. No need for special PC Software.
  • IP44 rated (sealed for field use).
  • Chargeable by external charger or Micro-USB.
  • Secure sector for all bolt data and a “public” sector for transfer via USB to a computer.
  • Automatic temperature compensation through a magnetic temperature probe.
  • Flexible bolt data storage options, large storage.


  • Programmable touch pad QWERTY alphanumeric input.
  • Creation, storage, retrieval of individual projects (group of fasteners).
  • Bolt types for projects (geometry, material, etc.) stored individually for repeated use/retrieval.
  • Flexible bolts/readings per project; no setup limits.
  • Temperature, signal parameters, scope trace and date/time stored with each reading.


  • Real-time clock – date-time stored with every reading.
  • Sleep mode and auto shut off.
  • Power/sleep LED
Weight 1.445kg (including batteries)
Size 175mm x175mm x 42 mm
Keyboard 3.8x2.2 in / 97x56 mm Touch Screen
Power Source 4 sealed 3.4mAH Lithium Ion 18650 cells, twin smart chargers with SOC monitoring. Operating time in 20+hrs, USB and 115/230 VAC Fast 9v standard 2.1mm power supply input
Memory 256 Mb internal RAM
Data Output Mini USB

There are several things to consider when deciding which transducer to use:

  • The crystal diameter should be completely in contact with the bolt end surface.
  • The outside diameter should be clear of any obstruction.
  • The frequency should be chosen to suit the bolt length.
  • The larger the diameter the stronger the signal and therefore better results are obtained by using the largest size transducer that will fit on the bolt.
  • Boltight recommends the 3/8” diameter, 5MHz transducer as the best general purpose covering 90% or more of typical bolting applications.
Size (diameter) Frequency Application
1/8” (3.1mm) 5 Mhz General Purpose
1/8” (3.1mm) 10 Mhz Hi-resolution/short Bolts
3/16” (4.7mm) 5Mhz General Purpose
1/4” (6.3mm) 2.25 Mhz Long Bolts
1/4” (6.3mm) 5 Mhz General Purpose
1/4” (6.3mm) 10 Mhz Hi-resolution/Short Bolts
3/8” (9.5mm) 2.25 Mhz Long Bolts
3/8” (9.5mm) 5 Mhz General Purpose
1/2” (12.7mm) 2.25 Mhz Long Bolts
1/2” (12.7mm) 5 Mhz General Purpose
3/4” (19.0mm) 2.25 Mhz Long Bolts
3/4” (19.0mm) 5 Mhz General Purpose


Diameter reference Outside diameter
1/8” (3.1mm) 0.38” (9.6mm)
3/16” (4.7mm) 0.38” (9.6mm)
1/4” (6.3mm) 0.75” (19.0mm)
3/8” (9.5mm) 0.81” (20.5mm)
1/2” (12.7mm) 1“ (25.4mm)
3/4” (19.0mm) 1.21” (30.7mm)


Diameter reference Outside diameter
1/8” (3.1mm) 0.23” (5.8mm)
1/4” (6.3mm) 0.355” (9.0mm)
1/2” (12.7mm) 0.605” (15.3mm)

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